In previous builds, third-party apps could inject entries more easily. KB5031358 tightens the security requirements for context menu extensions. While this improves security, it has caused temporary friction with popular archive tools and context menu editors. If your right-click workflow feels slightly different—or if a favorite tool is missing—it’s likely due to the stricter signing requirements Microsoft has enforced in this cumulative update to pave the way for future Copilot integrations within the shell.

To help you understand the landscape at the time, here is a comparison with the update for the then-current version of Windows 11.

: A "Rapid Reset" attack targeting HTTP/2, which could cause denial of service. Reported Issues and Solutions